Controlling device for the throttle valves of internal-combustion engines



Agra s 1925. 1,579,324

L. c. JOSEPHS, JR

CONTROLLING DEVICE FOR THE THROTTLE VALVES OF INTERNAL COMBUSTION ENGINES Filed July 14. 1923 JHIIIIIIIII T ,....Jl i

Patented Apr. 1925.

ween LYMAN C. JOSEPI-IS, JR., 031" ALLENTOWN, PENNSYLVANIA, ASSIGNOR TO INTERNA- TIONAL MOTOR COMPANY, (3F NEVJ YQRK, N. Y., A CORPDBATION 01E DELAWARE.

CONTROLLING DEVICE iron TEE rnno'rmna vanvns or INTERNAL-COMBUSTION ENGINES.

Application filed ."July 14, 1923.

T aZZ whom it may concern:

Be 1t known that I, LYMAN G. Josnrrrs,

J11, a citizen of the United States, residing in the city of Allentown, in the State of Penn- 0 sylvania, have invented certain new and useful Improvements in Controlling Devices for the Throttle Valves of Internal-Combustion Engines, of which the following is a specification, reference being had to the accompanying drawings, forming a part here- This invention relates to devices for operating the butterfly valve of a power motor by means which are not manual although initiation of the operation thereof is manual. It has for its principal object to provide devices which are invariable in their operation, sensitive to intermediate adjustments of the driven parts as required, and include a friction drive for the protection of the parts in extreme positions of travel. In accordance with the invention an electric niotor or other available source of power is provided to actuate the throttle valve at a speed which is so reduced as to give the required sensitiveness in control. In the driving mechanism between the prime mover and the throttle valve there is interposed a friction drive which affords slippage in extreme positions of travel of the throttle valve thereby protecting the parts against breakage regardless of the care or skill of the operator.

In the preferred embodiment it is proposed to connect the throttle-valve operatively with a spring-pressed friction plate which is engaged in driving relation with a plate fixed on a shaft driven at the desired speed by the prime mover. In extreme positions of travel when the throttlevalve may be moved no further the friction plate with which it is connected being pressed yieldingly into frictional engagement with a disk on the driving shaft is permitted to rest regardless of continued rotation of the said shaft,

It will be evident as the description proceeds that the devices are applicable for association with different units of an internal combustion engine to be controlled but for convenience there has been shown in the accompanying drawings an embodiment wherein a butterfly valve of conventional form is actuated. In the drawings:

Figure l is a view in plan of the improved Serial in. 651,685.

control devices connected to a throttle valve and driven by an electic motor.

Figure 2 is a view in end elevation of the parts shown in Figure 1.

The actuating motor which, in practice, may conveniently be a small electric motor a drives through a universal joint I), if necessary, a worm shaft 0, through which reduction and speed may conveniently be secured, so that the driven shaft through which the power is ultimately delivered rotates so slowly as to give the desired sensitiveness in control. Such reduction gearing in the illustrated case includes a worm o meshed with a worm wheel (Z on the shaft d on which is a second worm (Z in driving engagement with a second worm wheel 6 on the driven shaft 7". Other reduction gearing than that illustrated may obviously be employed. The parts described may be enclosed in a suitable housing g. 911 the driven shaft 7' is secured a driving plate f against which is pressed yieldingly a friction plate g backed up by a spring h, the other end of which seats on a washer 71 carried loosely on the shaft 7. The washer z is maintained in desired relation to the spring [A and the tension of the spring is adjusted by means of an adjusting nut 70 and lock-nut 7c threaded on the end of the driven shaft 7. To the friction plate 9 is pivotally connected a link which may be operatively engaged with a throttle *alve h of a motor to be controlled.

The operation of the improved devices will be clear from the aforegoing descrip tion. The prime mover (0 drives av shaft f at a comparatively slow speed sufficient to enable a sensitive control to be obtained. The spring 72. presses the friction plate g against the face of the driving plat-of with sutiicient pressure normally to cause actuation of the throttle'valve in a direction de pending on the direction of rotation of the .ctuating motor A skillful operator by stopping the motor a may obviously arrest movement of the throttle valve in any desired position. If the motor a is not stopped it is evident that the throttle valve will be moved to one or the other of its extreme positions of travel. In such a position it is evident that the plate 7 may be moved no further. Continued rotation of the driving plate 7' will result in slippage between the tvvo plates against the trietion induced hy the spring 12 but no injury to the parts will ensue. The improved device is charaeterixtal hy simplicity, certainty of operation and complete protection to the mechanism.

it is to be understood that the charaet'er vi. the driving motor 1/ may he ehanggerl; hat any suitable reduction gearing: may he nterposed between it ane the eontrolled unit; and that the throttle valve may take other forms.

hat I claim is:

1. Controlling devices tor the throttle valve ot an internal comhnstion engine comprising a propelling motor. a shalt driven therehv. a trietion plate connected to the throttle valve and a triction plate carried by said shalt and engjae'ing said tirst named plate operativelv to deliver power to the throttle valve.

2. Controlling devices for the throttle valve of an internal eomhust'ion engine ineluding a propelling motor. a shat't driven thereh v. a 'l' 'iction plate secured to the sha it. a l'riction plate mounted loosel) on the ha it. a tan-in to hold said plates vi *ldin e'lv in driving engagement. and me ns to ('Hlillttlthe second named plate with the throttle valve.

3. In eomhinat'ion. an eleetrie motor. a sha'tt driven thereliv, reduction gearing: interposal hetvveen the shall and the motor. a 'l'riction plate secured to the shalt. a se ond plate mounted loosely on the shaft. a spring to press the seeontl named plate viehlinglv in driving engagement with the tirst na nl plate, means to adjust the tension ot' th spring. and maths to tifliilttt the seron l tamed plate with the throttle valve oi' an internal combustion engine.

This specitieation signed this ninth dav of July A. l 

